Threading

[wey97]

#include <windows.h>

void main(){
	
    while(1){
		
        while(FindWindow("IEFrame", NULL));

        MessageBox(0, "none", "", 0);

        while(!FindWindow("IEFrame", NULL));

        MessageBox(0, "one", "", 0);
		
    }
	
}

I want to know if there are no IE windows open or if there is at
least one open. The code works, but it ties up 100% of my CPU
and also I want to be able to run other code while this code is
running.

I thought of creating a separate thread to run the code above
but will I still have the same problem with all the resources being
tied up?